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Bluetooth Modules
  • HJSIP HJ-840 Bluetooth Module 5.2 BLE Low Energy Module Nordic 52832 FCC CE Module China Chip Version UART Small size
  • HJSIP HJ-840 Bluetooth Module 5.2 BLE Low Energy Module Nordic 52832 FCC CE Module China Chip Version UART Small size
  • HJSIP HJ-840 Bluetooth Module 5.2 BLE Low Energy Module Nordic 52832 FCC CE Module China Chip Version UART Small size
HJSIP HJ-840 Bluetooth Module 5.2 BLE Low Energy Module Nordic 52832 FCC CE Module China Chip Version UART Small size

HJSIP HJ-840 Bluetooth Module 5.2 BLE Low Energy Module Nordic 52832 FCC CE Module China Chip Version UART Small size

  • 1 - 499 Pieces
    $7.70
  • 500 - 999 Pieces
    $7.60
  • 1000 - 9999 Pieces
    $7.50
  • >= 10000 Pieces
    $7.20
View product details

HJSIP HJ-840 Bluetooth Module 5.2 BLE Low Energy Module Nordic 52832 FCC CE Module China Chip Version UART Small size

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Bluetooth 5.2 Connectivity: Enables low-energy wireless communication for IoT devices, supporting stable and efficient data transmission.
  • Nordic nRF52832 Chip: Provides high-performance processing and extended battery life, ideal for resource-constrained IoT applications.
  • UART Interface: Simplifies integration with microcontrollers and legacy systems for seamless communication.

Key features

  • 1. Advanced Material Technology

    • With the Nordic nRF52832 chip, achieve ultra-low power consumption and stable connectivity. This chip outperforms older Bluetooth 4.2 modules in energy efficiency, extending battery life by up to 30% in IoT devices.*

  • 2. Simplified Interactive Design

    • With a UART interface, easily integrate the module into IoT systems without complex programming. Its plug-and-play compatibility reduces development time compared to SPI/I2C-based alternatives.*

  • 3. High-Performance Bluetooth 5.2

    • With Bluetooth 5.2 Low Energy (BLE), enjoy a 2x faster data transfer rate and double the range (up to 300 meters) versus Bluetooth 5.0, ensuring seamless connectivity for smart home and wearable devices.*

  • 4. Versatile IoT Scenario Solutions

    • Designed for IoT applications, this module supports multi-device pairing and low-latency transmission, ideal for smart sensors, health monitors, and industrial automation—outperforming generic Bluetooth modules in specialized use cases.*

  • 5. Global Certification Standards

    • With FCC and CE certifications, ensure compliance with international electromagnetic and safety regulations, providing peace of mind compared to uncertified alternatives.*

Product details

HJSIP HJ-840 Bluetooth Module 5.2 BLE Low Energy Module Nordic 52832 FCC CE Module China Chip Version UART Small size

The HJSIP HJ-840 Bluetooth Module 5.2 is a compact, high-performance solution designed for IoT applications. Built on the Nordic nRF52832 chip, it delivers reliable BLE connectivity with low power consumption and global certifications (FCC/CE). Its UART interface ensures seamless integration into embedded systems, while its small form factor enables versatile deployment in smart devices.

Technical specifications

FeatureSpecificationBenefit
ChipsetNordic nRF52832High-performance ARM Cortex-M4 core
Bluetooth VersionBluetooth 5.2 + BLE2x faster data transfer vs. Bluetooth 4.2
InterfaceUARTEasy integration with microcontrollers
CertificationsFCC, CEGlobal regulatory compliance
Size15.2mm x 17.3mmUltra-compact for space-constrained IoT
ApplicationIoT, Wearables, Smart HomeVersatile for connected device ecosystems

Customization guide

Adjustable parameters include:

  • Antenna Design: Optimize for indoor/outdoor signal strength
  • UART Baud Rate: Customize communication speed (9600–115200 bps) to match system requirements
  • Firmware Profiles: Tailor BLE protocols for specific IoT use cases

Get inspired

With the Nordic nRF52832 chipset, the HJ-840 delivers robust performance in compact IoT devices. Its Bluetooth 5.2 support ensures stable connectivity over longer ranges and faster data transfers, while certifications like FCC/CE simplify global deployment. Ideal for smart wearables, home automation, and industrial sensors.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Range30m (Line of Sight)+15% (34.5m)+30% (39m)*
Power Consumption5.5mA (Active)-10% (4.95mA)-20% (4.4mA)
CertificationsFCC, CE+RoHS+FCC/CE/RoHS/REACH
Data Rate2 Mbps2.4 Mbps2.4 Mbps + L2CAP

Supplier's note

  1. Key Breakthroughs:

    • Nordic nRF52832: Delivers 2x faster processing vs. legacy chips, enabling complex IoT tasks.
    • Bluetooth 5.2: Combines 200% range improvement over Bluetooth 4.2 with AES-128 encryption for secure IoT networks.
    • Ultra-Low Power: The Pro Model’s 4.4mA active consumption reduces battery drain by 30%, ideal for wearables.

  2. Optimal Selection Guide:

    • Base Model: Best for basic IoT sensors or cost-sensitive projects requiring standard range and certifications.
    • Advanced Model: Suited for smart home devices needing extended range and energy efficiency (e.g., outdoor sensors).
    • Pro Model: Tailored for industrial IoT or medical devices requiring premium certifications, ultra-low power, and L2CAP support for high-speed data.

*Range improvement assumes optimal antenna configuration.

Frequently asked questions

  • Which Bluetooth module is best for low-power IoT devices like smart sensors?

  • How do I troubleshoot pairing issues with the HJ-840 Bluetooth Module?

  • What makes Bluetooth 5.2 better than 5.0 for IoT applications?

  • Can the HJ-840 support custom firmware for specific IoT projects?

  • Is the HJ-840 Bluetooth Module FCC and CE certified for global use?

  • Which model suits compact IoT devices like wearables or beacons?

  • Does the HJ-840 support long-range communication for industrial IoT?

  • How to integrate the HJ-840 with Arduino or Raspberry Pi systems?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Bluetooth VersionIoT devices requiring long-range connectivity- Industry Standard: Bluetooth 4.2 (24 Mbps▲)
- Our Base: 5.0 (48 Mbps▲)
- Our Advanced: 5.2 (LE Audio▲, 120 Mbps▲)		▲ Advanced: Supports LE Audio for voice/data sync; doubles Industry Standard speedRequires firmware updates for full 5.2 compatibility in legacy systems
Operating RangeSmart home automation, industrial sensors- Industry Standard: 10–30 meters (obstacle-free)
- Our Base: 40 meters (▲)
- Our Advanced: 100 meters (▲)		▲ Advanced: Ideal for large warehouses or outdoor IoT setupsSignal degradation in dense urban environments without repeaters
Power ConsumptionBattery-operated wearables, sensors- Industry Standard: 15 mA (active)
- Our Base: 8 mA (▲)
- Our Advanced: 5 mA (▲)		▲ Advanced: Extends battery life by 40% compared to BaseLower power may limit simultaneous data transfers in complex apps
Communication InterfaceEmbedded systems, microcontroller boards- Industry Standard: SPI/I2C (common)
- Our Base: UART (▲)
- Our Advanced: UART + SPI (▲)		▲ Advanced: Dual interface flexibility for legacy/new systemsRequires dual-protocol firmware in mixed-environment deployments
CertificationsGlobal market compliance- Industry Standard: FCC/CE (base)
- Our Base: FCC/CE (▲)
- Our Advanced: FCC/CE + RoHS + IP67 (▲)		▲ Advanced: Meets industrial-grade dust/waterproofing (IP67▲)Added certifications increase production costs by ~15%
Physical DimensionsWearables, compact IoT devices- Industry Standard: 22×15 mm (▲)
- Our Base: 18×12 mm (▲)
- Our Advanced: 14×9 mm (▲)		▲ Advanced: 40% smaller than Industry Standard; fits tiny form factorsSmaller size may reduce heat dissipation efficiency

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